Brinkmann 810-3015-S Owner's Manual page 11

Step 14
Attach firebox top to firebox bottom using
six M5 X 10 mm bolts and M5 nuts.
Step 15
Attach firebox assembly to smoker using
six M6 X 10 mm bolts.
Step 16
Secure firebox bottom to left beam using
two M5 X 10 mm bolts and M5 nuts.
10